Thanks for the response Dennis. So, let me just rephrase this and see if i got it right?

I bought a dual LNB system and a second box. I know i can watch sat. stations on both boxes/tvs now (or will when it's hooked up). If i wanted to add a 3rd box to a 3rd tv, i need the 'signal modulator' (and of course the 3rd box) you mentioned? Can you give me any more info on that device? Is it expensive? Hard to install? etc.

Sorry if this is a dumb question. I'm techno savy but have never had to deal with a dish system before. I'd like very much to be able to buy 1 more box to hook up 1 more tv. It just seemed like sales hype that the salesperson told me i needed to buy a 2nd dish in order to hook up that 3rd tv.

Thanks so much for your help
Craig